In the notes for both it says support for XP has been dropped so if you are still running that OS, don't update.

Thanks, Don, downloaded and installed both CNX2 and VNX2 without a hitch.

Just hope these are not the last updates we'll see, I use CNX2 as my NEFs editor, will miss it when it's gone. In fact, I plan to continue using both CNX2 and VNX2 after their announced demise, probably in a dedicated photo editing notebook running under Win 8.1.1, as suggested by Thom Hogan in a recent article on the subject.